Cop-tube.



Nd. 851,095:- PATEN'I'ED APR.- 23, 1 907.

w. .KOBHLER.

cor TUBE.

AB I LIOATION FILED AUG. 25. 1905.

v INVENTOR: 1

WITNESSES:

THE NORRIS rtn'ns cm, wAsnmcrcm-n c.

UNITE srnrns PATNT Itlhh WILLIAM KOEHLER, or FULEEIIKEQEW YORK, ASSIGNORTO AMERICAN TEXTILE SPECIALTY MACHINERY COMPANY, OF NEWV YORK, N. Y., A

COP-TUBE.

Specification of Letters Patent;

Patented April 23, 1907.

Applieationfiled August 25. 1905. Serial No. 275,717.

To all whom, it may concern-.-

Be it known that I, WILLIAM KOEHLER, a citizen of the United States,residing in Fulton, in the county of Oswego and. State of New York, haveinvented certain new and useful Improvements in Cop-Tubes, of which thefollowing is a specification.

In cop tubes of the ordinary form, especially when used in high speedlooms, there is danger of the cop slipping off the shuttle spindle underthe sudden jarring movements of the shuttle, or where the cop tubesticks firmly 011 the spindle there is danger of the yarn being slidalong the cop tube toward the free end or point of the spindle. Thespindle and cop tube are ordinarily slightly tapered toward the point.

The present invention provides a cop tube of such a shape as to hold theyarn more firmly. It has been observed that at the ends of the cop theyarn, being supported at only one side, or less at one side than at theother, is the first portion of the yarn to be come loosened under theaction of the shuttle. I propose, therefore, to provide a tube with itsintermediate portion of larger diameter and its butt end and pointtherefore of smaller diameter, thereby holding the yarn which forms theend portion of the cop from movement longitudinally of the spindle.

Preferably also a narrow ring of enlarged diameter is formed near thepoint of the tube for a similar purpose.

The accompanying drawing illustrates an embodiment of the invention, thefigure being partly an elevation and partly a longitudinal section ofthe cop tube showing the yarn in section thereon.

Referring to the embodiment illustrated, the tube is preferably made ofpaper, which can be easily stamped or molded to the desired shape. Forconvenience of reference its entire length may be considered as dividedinto a butt portion A, an intermediate portion. B, and a free end orpoint C. Preferably the intermediate portion B is provided with abruptrectangular shoulders I) and E at its ends, and. with shallow grooves Fat short intervals. Preferably also a narrow ring G of enlarged diameteris provided on the point of the tube near its extreme end. The yarn iswound onthe tube in approximately the position shown, extending fromnear one extreme end to the other.

The rear end portion H of the yarn, being unsupported except by theintermediate per tion J, is usually the first part of the yarn to workloose. The taper of the tube, however, prevents the yarn from workingbackward or toward the butt of the spindle, and the abrupt shoulder Dprevents it from working forward. The portion K of the yarn nearthepoint likewise is ordinarily supported only by the intermediate portionK, and is apt to work loose. The abrupt shoulder E and the ring G,however, serve to substantially prevent any such movement of the yarn K.

I have tested the form of tube shown, and find that in practice itreduces to a minimum the dil'liculties caused by loosening of the yarn.

The most important feature of the invention is the holding of the heelor butt portion of the cop. The cops are usually cross wound, and it isfound that if the butt por tion be firmly held, it in turn holds theremainder. flherefore the enlarged part B of the tube may be divided, ormay be made longer or shorter within considerable limits, or may be madewith grooves F in any desired direction, and the separate ring G mayusually be omitted.

The most convenient method of manufacture is to make separate sleeves Land. N fitting over the tube proper M to form the en larged portion Band the ring G. This can be readily applied to the main tube and gluedthereon. The method of manufacture however may be varied withinconsiderable limits.

By reason of the firmness with, which the yarn is held on the tube, itis possible with this invention to use considerably larger cops thanformerly, the production of the spinning'machinc can be increased, andalso the production of the loom, by eliminating the waste and. loss oftime involved in changing shuttles. Experiments have shown. that withthe ordinary style of cop tubes, the last layer of thread. from the heelto a point an inch or more beyond, comes off all at once, and isgenerally wasted. ith the present spindle it is found that the yarn runsoff properly to the verylast, and there is practically no waste. This isprimarily due to the shoulder D, and the saving in waste eflected ismore than sulficient to cover the additional cost as compared with theplain tube.

The diameter of the part B being greater than it would be if the taperwere continuous from end to end, its surface is also greater so thatthere is a greater area of contact for the yarn. In winding on the yarn,on the spin ning mule the sudden increase in tension due to the abruptrectangular shoulder D and the continued comparatively great diameter ofthe entire central portion, cause the yarn to be wound tighter so as tohold more firmly on the plain parts of the portion B and to bite morestrongly into the grooves F. Where enlargements of little axial lengthor of tapered ends have been used the tendency to wind tigher resultsmerely in shifting the yarn toward one end or other of the enlargement.The long enlargement B and the abrupt ends thereof prevent such slippingand ensure the tight winding of the yarn.

Though I have described with great particularity of detail a certainspecific embodiment of my invention, yet it is not to be understoodtherefrom that the invention is limited to the specific embodimentdisclosed.

. Various modifications may be made by those skilled in the art indetail and in the arrangement and combination of the parts withoutdeparture from the invention.

What I claim is A cop tube substantially as herein shown and described,having an enlarged intermedi ate portion B of considerable lengthtapering toward the point of the tube and terminating in abruptrectangular shoulders D and E, a butt A 01 smaller diameter at the pointwhere it joins the intermediate portion B and ta ering toward saidportion, and a point 8 of smaller diameter at the point where it joinsthe intermediate portion B and tapering away from said portion, wherebythe yarn is provided with a greater bearing surface at the intermediateportion and is wound firmly on the intermediate portion without tendencyto endwise slip, the enlargement of the intermediate portion of the tubebeing formed by a separate sleeve L fitting over the tube proper M.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

\VILLIAM KOEHLER. WVitnesses D. M. SULLIVAN, A. S. KALAR.

